Anyone else with hypothyroidism..?

Brittany
I have been on thyroid medication for almost year now. Periods were still normal. In February my period was late by 15 days. I'm now late again. No sign of aunt Flo, which I usually have light spotting before. And all negative tests. I'm supposed to meet with my fertility specialist again next Wednesday, but was just wondering if thyroid meds can cause this. Thanks 😊